( l^t ) 
image i and iaftly fenration could be better continued 
the Tenfe Fibres of the Piarmter bytheone^ then to th^ 
brain by the/o/^^r of theothen 
Although this laft Objedion doeanotdiredly ftrikeae 
Notion of Vifion (becaufe a eqrrofpondencM of Fihm 
maybe ujidtrftood as well in one as tVotherj? yetitmay 
not be amifs to coi^Gder it particularly $ becaufe I have 
fcrmfcrly affeited and do ftillj thzt F?/ion can be no way 
better performed then by the Fibres of the l^tina^ however 
ether fenfes may require in their adion a greater Jhfnejlm the 
Membranes that are fubfervient to them> whieii fome of 
late will have to be the ©rily inftruments offenfe, Slrft 
then it is certain that fas 1 faid before) ih^^etinah no 
more tranfparent if fo much as the oic'd paper in the lantern^ 
which yet ferves well enough to inte^ctpt the turningi^ 
mages of it. ^Secondly, That being of a whitifo colour^ and. 
refembling thereby the white Paper id the di^rk hoofe, it 
is fitter to receive the images oi colour d u^/^Sj- then the 
dar^Jhadect the Choroeides, Thirdiy, it being the more 
inward or medullary eocpanfion of the Opttc Nerve it Can more 
immediatly tranfmirany niotipns to the M^^^^^^i^/i^^m of the 
brain (ox the commo7ifenjory) then the other part, whicS 
by its continu c don to ihtpia mater does not reach it 5 and 
this I urg d formeiiy, w^hich his not yet been anfwer'd by. 
any of Monjieur Mariotte s followers. Fourthly^ The ^^^i^- 
i^^/^/j- running uponic is as well an objediion againft the 
Chorveides (it the latter be not chiefly a Plexus of the fame 
as has been lately well argued^, becaufe^^^ Co^^ lies under ^ 
the ^tina» and confequently under them tool and there- 
fore hereby is only proved that in fome pofitjons of our 
body, or in fome stations 3 we do not fo well view an Ob-- 
jefl: as in others^ and this is very true. Fifthly, As to the 
Tenfnefs of the Fibres, I before obferv'd that the K^tina 
has as much as thofe of a Spider s Weh^ and this is fufficient^ 
nay mote fiiitableto the finer ftroakso{ the etherial or lucid 
master, and the nice agings of thisfeafe;, which is not re- 
quired ; 
